Principal Software Engineer

JR United Kingdom; Hounslow; Hybrid; GBP 60,000 - 90,000; Full time

Job summary

A tech company with millions of customers seeks a Principal Software Engineer to enhance their new enterprise platform. In this role, you will address complex software challenges and mentor junior developers, playing a vital part in delivering high-quality user experiences. Offering hybrid work and extensive benefits, this opportunity is ideal for innovative individuals eager to drive technical excellence.

Benefits

25 days annual leave + BH

Annual bonus

Pension

Employee discounts

Enhanced Maternity & Paternity pay

Qualifications

• Understanding of low latency, high-scale approaches.
• Thorough grasp of distributed web caching tools.
• Willingness to challenge the process and push for innovation.

Responsibilities

• Scale and optimize front-end performance and interaction with APIs.
• Mentor junior developers and assist with their professional development.
• Implement Agile and Scrum methodologies in software development.

Skills

WebSockets

Performance Optimisation

Agile

Scrum

React Native

MongoDB

Hazelcast

Job description

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Principal Software Engineer, south west london

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Client:

Lorien

Location:

south west london, United Kingdom

Job Category:

Other

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EU work permit required:

Yes

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Job Views:

3

Posted:

04.06.2025

Expiry Date:

19.07.2025

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Job Description:

Principal Frontend Engineer

• Manchester city centre
• 2 days in office + flexible working hours

JOB PURPOSE

Having recently launched a new proprietary back-end enterprise platform, you will play a key role in transforming the front-end elements that serve millions of customers across the UK. This will involve working closely with the Heads of Technology, Software Architects and team leads, so strong stakeholder management ability is crucial.

Duties:

• Scaling and performance optimisation of web front-end and interaction with API layers
• Resolve high-level, complex software challenges and optimise system performance
• Implement software development processes, including Agile and Scrum methodologies
• Contribute to software design, code, and test procedures
• Participate in the estimation of software development projects
• Contribute to the development and maintenance of technical documentation
• Mentor Junior Developers and assist with their professional development.

REQUIREMENTS:

• Understanding of low latency, high-scale approaches such as WebSockets
• Thorough grasp of distributed web caching tools and techniques, e.g. Redis, etc
• Understanding of fundamental software development best practices, architectures and patterns
• Awareness of modern deployment methodologies
• Expertise in performance optimisation of web technologies
• Willingness to challenge process and existing ways of working or to truly own the domain you’re a part of, pushing for innovation through valuable technical or non-technical change
• Any additional experience including React Native, MongoDB or Hazelcast

ON OFFER:

• Hybrid remote working (2 days a week in Manchester city centre)
• 25 days annual leave + BH
• Annual bonus, Pension, Death in service, Employee discounts, Tax efficient saving scheme
• Enhanced Maternity & Paternity pay

THE COMPANY:

With millions of customers spanning the UK and the U.S., this product driven tech company developers large scale enterprise systems that handle 1000's of transactions and calculations every second, and handles massive amounts of live incoming data. Their front-end systems span web, mobile and stand-alone terminals.